[T] : Ground Points

1. [P]  : Indicates reference locations in the system circuit on the vehicle.

   * The first character of the code indicates the alphabetical code allocated to the wire harness, and the second character indicates the serial number of the parts connected to the wire harness.

   Fig 1: "H4" Light Failure Sensor Reference (Example)

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2. [Q]  : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.

   Example: Connector "1" is installed on the left side of the instrument panel.

3. [R]  : Indicates the reference position on the vehicle of J/B and Wire Harness in the system circuit.

   Example: Connector "3C" connects the Instrument Panel Wire and J/B No.3. It is installed on the instrument panel left side.

4. [S]  : Indicates the reference describing the wiring harness and wiring harness connector (the female wiring harness is shown first, followed by the male wiring harness).

   Example: Connector "CH1" connects the Engine Room Main Wire (female) and Instrument Panel Wire (male). It is installed on the left side kick panel.

5. [T]  : Indicates the reference showing the position of the ground points on the vehicle.

   Example: Ground point "H2" is installed on the back panel center.

The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between ground points can also be checked this way.

Fig 2: Ground Point Wiring Diagram (Example)

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The "Current Flow Chart" article, describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully understood.

Fig 3: Power Source (Current Flow Chart) (Example)

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Fig 4: Connector List (Example)

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1. Indicates connector to be connected to a part. (The numeral indicates the pin No.)
2. Junction Connector

   Indicates a connector which is connected to a short terminal.

   Junction connector in this article include a short terminal which is connected to a number of wire harnesses. Always perform inspection with the short terminal installed.

   Fig 5: Junction Connector And Short Terminal (Example)

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3. Parts Code

   The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which start with the same letter.

4. Connector Color

   Connectors not indicated are milky white in color.

5. Indicates the connector shapes which are used to join wire harnesses.

   On Left: Female connector shapes

   On Right: Male connector shapes

   Numbers indicate pin numbers.

6. Indicates connector colors. (Connectors with not indicated colors are white)

Fig 6: Connector Part Number List (Example)

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1. Part Code
2. Part Name

   The text in the parentheses is additional parts information.

3. Part Number

   Toyota Part Number are indicated.

Not all of the above part numbers of the connector are established for the supply.